Redfoot/Yellowfoot hybrid

[Anyfoot]

Time will tell...

Hi Hlogic. Your conversations are interesting and educational as always. I think the question is. Do you know of any red/yellow hybrids that are proven fertile adults?
Sorry to but in. Been watching this thread. Very interesting. I have one more thing to ask. The yellowfoot is the female here, it looks to have an awfully deep concave plastron, is this the normal characteristic of female denticulata?

Thanks

Craig

 

[HLogic]

Hi Hlogic. Your conversations are interesting and educational as always. I think the question is. Do you know of any red/yellow hybrids that are proven fertile adults?
Sorry to but in. Been watching this thread. Very interesting. I have one more thing to ask. The yellowfoot is the female here, it looks to have an awfully deep concave plastron, is this the normal characteristic of female denticulata?

Thanks

Craig

Thank you, Craig. I am not aware of any F2 RF x YF offspring. The female YF's in my group are all 'just like the picture in the catalog' flat plastrons.

 

[rande]

General externally visible morphology leans towards hybrid. Whether they are 'mules' in terms of reproductive ability can only be determined after sexual maturity.

Someone told me that mules are infertile because horses and donkeys have different numbers of chromosomes， however， redfoots and yellowfoots do have same number of chromosomes. So hybrid between redfoot and yellowfoot is fertile， is this necessarily true？

 

[rande]

Hi Hlogic. Your conversations are interesting and educational as always. I think the question is. Do you know of any red/yellow hybrids that are proven fertile adults?
Sorry to but in. Been watching this thread. Very interesting. I have one more thing to ask. The yellowfoot is the female here, it looks to have an awfully deep concave plastron, is this the normal characteristic of female denticulata?

Thanks

Craig

Sam told me the yellowfoot is a male. ：.）

 

[Anyfoot]

Sam told me the yellowfoot is a male. ：.）

So is that redfoot in the photo male or female?

 

[rande]

So is that redfoot in the photo male or female?

was told female.

 

[Anyfoot]

was told female.

Wow I learn something every day on here. From the photo it looks to have concave plaston, with a waste line and large tail but female. Thanks.
That cleared up my thoughts with the yellow.

 

[HLogic]

Someone told me that mules are infertile because horses and donkeys have different numbers of chromosomes， however， redfoots and yellowfoots do have same number of chromosomes. So hybrid between redfoot and yellowfoot is fertile， is this necessarily true？

I don't believe as a general rule that either case is necessarily true. Chromosomes are simply visible (stainable) collections of genetic material. The genes, not the chromosomes, determine the outcome of viability of the organism. That is not to say that some incompatible chromosomal combinations do not exist. However, even chromosomal compatibility does not guarantee genetic compatibility - like male calico cats and many other examples.

 

[rande]

Wow I learn something every day on here. From the photo it looks to have concave plaston, with a waste line and large tail but female. Thanks.
That cleared up my thoughts with the yellow.

to be honest，both looks like female to me.

 

[rande]

I don't believe as a general rule that either case is necessarily true. Chromosomes are simply visible (stainable) collections of genetic material. The genes, not the chromosomes, determine the outcome of viability of the organism. That is not to say that some incompatible chromosomal combinations do not exist. However, even chromosomal compatibility does not guarantee genetic compatibility - like male calico cats and many other examples.

this is complicated：.） so how do think about the genders of the adults？

 

[HLogic]

this is complicated：.） so how do think about the genders of the adults？

Male RF, female YF shown in the pics in the first post.

 

[rande]

Male RF, female YF shown in the pics in the first post.

was told male yellowfoot and female redfoot.(￣▽￣)

 

[Yvonne G]

...and some horse/donkey crosses have ended up fertile.

 

[rande]

...and some horse/donkey crosses have ended up fertile.

in very rare and very lucky case.

 

[HLogic]

was told male yellowfoot and female redfoot.(￣▽￣)

Large tail for a female RF but not as large as some males. A dangerous combination that way due to the much larger size of YF eggs, IMO.

 

[rande]

Large tail for a female RF but not as large as some males. A dangerous combination that way due to the much larger size of YF eggs, IMO.

so you do think the redfoot is female anf the yellowfoot is male？

 

[HLogic]

...and some horse/donkey crosses have ended up fertile.

...as have some male calico cats and some white cats with blue eyes are not deaf and probably exceptions to every 'rule' in genetics. We have 23 pairs of chromosomes but ~100K genes. That allows for a BUNCH of combinations and many of them are bound to be exceptions.

 

[HLogic]

so you do think the redfoot is female anf the yellowfoot is male？

I have no problem believing I was mistaken.

 

[cdmay]

IMO, the juvenile(s) do have the appearance of being hybrids - a decidedly RF carapace and very YF head morphology (scalation excluded). I'm not at all convinced these animals are of even a marginally increased value. This 'appeal' seems unique in the animal world. I can think of no other occasion where a mutt is valued more than a purebred - vanity notwithstanding (ligurs, labradoodles, cockacraps, etc.).

My feelings exactly.

 

[Anyfoot]

I have no problem believing I was mistaken.

Whether your wrong or right, my mind is at ease, I thought male RF and female YF also. I've seen many different exceptions to every so called way of identifying RF and YF gender. However the tail so I believe is a dead cert way of identifying gender.